I guess it would come down to how proficient you want to be; personally I am happy with being able to hit an 8” plate at 25 yards with all my handguns. Yes I practice with my carry gun the most; however I want my range trips to be fun. I shoot no less then 4 different handguns when I go to the range. For me shooting is fun not a competition. If I were to start competing I would probably limit my self to one handgun to become the best I could be.